ui/dmabuf: extend QemuDmaBuf to support multi-plane

mesa/radeonsi is going to support explicit modifier which
may export a multi-plane texture. For example, texture with
DCC enabled (a compressed format) has two planes, one with
compressed data, the other with meta data for compression.

v2:
  * change API qemu_dmabuf_get_fd/offset/stride to
    qemu_dmabuf_get_fds/offsets/strides.
  * change API qemu_dmabuf_dup_fd to qemu_dmabuf_dup_fds.
  * add an extra arg to these API for the length of the
    array.

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Qiang Yu <yuq825@gmail.com>
[ Fix style ]
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-ID: <20250327025848.46962-2-yuq825@gmail.com>

1 files changed, 4 insertions, 3 deletions

diff --git a/hw/vfio/display.c b/hw/vfio/display.c
index f3e6581f15..9c6f5aa265 100644
--- a/hw/vfio/display.c
+++ b/hw/vfio/display.c
@@ -213,6 +213,7 @@ static VFIODMABuf *vfio_display_get_dmabuf(VFIOPCIDevice *vdev,
     struct vfio_device_gfx_plane_info plane;
     VFIODMABuf *dmabuf;
     int fd, ret;
+    uint32_t offset = 0;
 
     memset(&plane, 0, sizeof(plane));
     plane.argsz = sizeof(plane);
@@ -245,10 +246,10 @@ static VFIODMABuf *vfio_display_get_dmabuf(VFIOPCIDevice *vdev,
 
     dmabuf = g_new0(VFIODMABuf, 1);
     dmabuf->dmabuf_id  = plane.dmabuf_id;
-    dmabuf->buf = qemu_dmabuf_new(plane.width, plane.height,
-                                  plane.stride, 0, 0, plane.width,
+    dmabuf->buf = qemu_dmabuf_new(plane.width, plane.height, &offset,
+                                  &plane.stride, 0, 0, plane.width,
                                   plane.height, plane.drm_format,
-                                  plane.drm_format_mod, fd, false, false);
+                                  plane.drm_format_mod, &fd, 1, false, false);
 
     if (plane_type == DRM_PLANE_TYPE_CURSOR) {
         vfio_display_update_cursor(dmabuf, &plane);